Toyota Sienna Service Manual: Wiper switch
COMPONENTS

REMOVAL
1. REMOVE STEERING COLUMN COVER
2. REMOVE WINDSHIELD WIPER SWITCH ASSEMBLY

- Disconnect the connector.
- Using a screwdriver, disengage the claw and pull
out the windshield wiper switch assembly.
NOTICE:
The claw will be broken if pressed hard.
HINT:
Tape up the screwdriver tip before use.
INSPECTION
1. INSPECT WINDSHIELD WIPER SWITCH ASSEMBLY

- Continuity Check
- Check the continuity between each of the
terminals of the connector.
Standard:
Front Wiper Switch

Front Washer Switch

Rear Wiper Switch

Rear Washer Switch

- Intermittent Operation Check
- Connect the voltmeter (+) terminal to the
terminal 7 (+1) of the connector, the voltmeter
(-) terminal to the terminal 2 (EW) of the
connector.
- Connect the battery (+) to the terminal 17 (+B)
of the connector, the battery (-) to the terminal 2
(EW) and the terminal 16 (+S) of the connector.
- Turn the wiper switch into the INT position.
- Connect the battery (+) to the terminal 16 (+S)
of the connector for 5 seconds.
- Connect the battery (-) to the terminal 16 (+S)
of the connector. Operate the intermittent wiper
relay and check voltage between the terminal 7
(+1) and the terminal 2 (EW).

- Operation Check (Front Wiper)
- Turn the wiper switch into the OFF position.
- Connect the battery (+) to the terminal 17 (+B)
of the connector, the battery (-) to the terminal
16 (+S) and 2 (EW) of the connector.
- Connect the voltmeter (+) terminal to the
terminal 7 (+1) of the connector, the voltmeter
(-) terminal to the terminal 2 (EW) of the
connector. Turn the washer switch ON and
OFF and check voltage between the terminal 7
(+1) and the terminal 2 (EW).

INSTALLATION
1. INSTALL WINDSHIELD WIPER SWITCH ASSEMBLY
2. REMOVE STEERING COLUMN COVER
COMPONENTS
REMOVAL
1. REMOVE REAR WIPER BLADE ASSEMBLY
Remove the rear wiper arm head cap from the rear
wiper arm.
Raise the rear wiper blade to the position as shown
i ...
ON-VEHICLE INSPECTION
1. INSPECT FRONT WASHER MOTOR
Operation Check
Pour the water into the washer jar with the
windshield washer motor and pump installed to
the washer ...
Other materials:
Master Error
DTC 01-DF Master Error
DESCRIPTION
DTC No.
DTC Detection Condition
Trouble Area
01-DF
*1
The device with a display fails and the master is
switched to the audio device.
Also when a communication error between sub-master
(audio) and master occu ...
Open in ABS Motor Relay Circuit
DESCRIPTION
The ABS motor relay supplies power to the ABS pump motor. While the ABS is
activated, the ECU turns
the motor relay on and operates the ABS pump motor.
If the voltage supplied to the motor relay (+BM) is below the DTCs detection
threshold due to low voltage
from the battery ...
Transmitter ID not Registered
DTC C2171/71 Transmitter ID not Registered
DESCRIPTION
The IDs of each tire pressure warning valve and transmitters are registered
to the tire pressure warning
ECU.
When the IDs have never been registered, a DTC is output.
INSPECTION PROCEDURE
NOTICE:
When replacing the tire pressu ...